Ok hear me out because I know it's a long game. However, between 1 and 2, 1 is definitely shorter. What they could do is possibly make it so they don't have to do the worlds they could skip (aka monstro, atlantica, and olympus coliseum). But let's assume they do do those and do some math here. 30 minute episodes, playing on normal and on the 1.5 version so they can skip cutscenes. there are 11 worlds total in KH1. Each world takes inbetween an hour to an hour and a half depending on how bad you are. Let's assume an hour an a half. That's 33 episodes. The longest versus so far has been 25 episodes, Super Mario Galaxy, but the longest with just Tyler and Josh is 22, their first one. If assuming though they'd take an hour per world then it's 22 episodes on the dot just like Mario Sunshine. It honestly depends on how good Tyler and Josh are at Kingdom Hearts, and I know they both have played it before (especially Tyler he named his frikin cats Roxas and Kairi). And if we were to take Monstro, Atlantica, and Olympus out of the rotation, then they only have 8 worlds, and the length would fit nicely with all the other versus. I honestly think it's very possible for them to do a versus in this game and it would make my day for sure because I love Kingdom Hearts (KH2 is my favorite but KH1 is still amazing), and I'm sure a lot of other fans would feel the same way. Let's just hope they actually feel like doing it.